Question

A cyclist moving on circular track of radius 50metres completes one revolution in 4 min .what is his average speed and average velocity

Answer 1

Radius = 50 cm = 0.5 mtime = 4 min = 240 s
Average speed = total distance travelled/ total time taken  Avg speed = 2πrt = 0.01 m/sAvg velocity = displacement / total time taken = 0Aas initial and final points are same.

Answer 2

Hey.

Here is the answer.

Radius of the track, r = 50m

So, path traced in 1 revolution = 2πr

= 2×3.14×50= 314 m

t = 4 min = 4×60 s =240s

So, speed = 314/240 = 1.308 m/s

Also, as he complete the revolution so he is finally back to the position where he started,

so, displacement = final - initial position = 0m

So, velocity= 0 m/s

Thanks .